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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '070ae401e4be07d27b5bff4676f191754deea6b2971edb865c8cb144fa931bbd' 
  AND token = 'nSjPxbsMxaTuD/iP5GT408NkwYIDQ6WSRUn33QDtKr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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