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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79a4b957a5543c6c19bf848e2b1b91f66d641aae9928cbcd899353152c78139c' 
  AND token = 'ie6fy2FI21F0k+Ov67U4yLOddwpQg9mpH0U7odoZNmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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