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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82972f0133d49d555b9eb157bfc4b1d07c14b778721e5f4c772ef038c66bc016' 
  AND token = 'F8RKAKU4eFW5iB5KW6+EpRP2LMEHxvSE74xBzEyYoSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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