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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e06b2cbb83c3bfe3569848b7343ff15565d0514a3c3b4e539f46a941d50221e0' 
  AND token = 'ox41g5DNCTBqP8IF/xENHfUHAtJDuYJi4cmyZ4JfTnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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