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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c44c5f182868d41f5692b61734bea983f2962b5cc5278f4b25f5d39ce4301df7' 
  AND token = 'QGUS/rMyFxlFF71W1LA085S76C0eD603awRRsU7VIAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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