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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'a00248e6cb49b4aa7e82d6315b19a6a6342bb5b548afd4d46676a03cf6e02b9b' 
  AND token = 'hKsi4h6oXp1qgp8psrfpVW8mjDj2Kgi61QYsjRNPeYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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