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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8970ab144119528bc3c36eaeeb9eed99d0c579435862a5c54ba51ec1069dc402' 
  AND token = 'J5G+PdsMRSov7DsVdAWEEDhbQ7v/iJBnWJvSfF10wCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00082

JSON explain

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