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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e80fbc13c8c3bfd1b43fb4bd073ddba0392dce9d4d44023054fb21ae16f88ce' 
  AND token = '9o+ujl9mhdq2C04our0chhbH6yO+7/MjrgQENZmWFqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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