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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d0085daf09f426abe2cd2f784732e55f2315725575e2471e0255a2e1433769e' 
  AND token = 'Bcln1FlOcUYreZ14GFIwZ1A13Glx1VOv/Pbuz9O11/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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