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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f463e001386d25329fca76e49038bf5dbd4ee426142ea0820b3f8c4ad3d8d0d' 
  AND token = 'RPrsEuoLDP/kqCvWAT2jFFGJ1DqZ7Asg9nSyAfzse0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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