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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '8bda0a1298418ee61393638bdcbaaf1030f6ed8f5820486a3159b4434b8db0a5' 
  AND token = '9lWZ0XpHAGQyu+0+Ufl2cLU+KYjQKMPtfK07+nnHHJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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