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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04ead68ef201d5f5a7bd526b902219bd591e1616b4ac20dc98008ea13e3b8b2c' 
  AND token = 'EcYQlB7u/bZO7Z1a/Awt5RqibMm3IVAZRHC4wMknWxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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