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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '44814a9de4dc712f1c815f1390262a2348404d4e0fc67b413cb57f349e5d06be' 
  AND token = '/EIm+3r8DMtNePFglHdebNjTH/r76eypVe5ZYEnRXIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}