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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45c104955c8c77fb1861f82378781a2f5a1f3e6c38f87ff1d46803cb52d804cb' 
  AND token = '9ulik9u6EX4wu/5TWW1JcffAQ1IIlDSLVjRDhWok/Nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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