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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4e9b5277dfd3a542a513b0b2b157fd0ae3133b2979de7a307a022f601ab1164' 
  AND token = 'zLOL5eVqwBkFu3p9Eq2V0HRPohR4EJuKBzmF4oSiBv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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