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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3fd2b1d3d82e6747844c5774009f4ed5c03fcc37e09423bac24e172ec36ec79' 
  AND token = 'p22nkkJr39vmNObUAB99xuFTM2Bu69JGZHFiW+2SMgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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