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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c4eac02fadaa10e4f03e90c93e6e51b190560d4e44fd71b1031a1f4a2bd0149' 
  AND token = 'Fh0i9lh73hS8VxV249fD74xp5WUPll5LrsxmZWLE/AI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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