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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '628db33ca9e37fabb013ae563ab060524ee2d2d82d1cd1f30e4a0c534ea7f175' 
  AND token = 'gVdI1hmy5O0nlF8TFPrNRIcOjWZpM/ilkJwraNmHFD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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