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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18714e31fa111ad49aeb8ba8206c743472d7536c3debee3b70d6580e1410ff82' 
  AND token = 'K0F7tEqva/L7EOwnOBuMXuA0VkrlD5HdJ1324TP/2RY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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