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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdf4138888d47e8c005ca39f90a5f6e2db70c5e6ee1ec3f0cbda474855e4299d' 
  AND token = 'c9WYu6iaX3z2OHHgNHxgoPWzRLSCztN/nx94dfZSbpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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