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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90883c0e7439e7d78db206288f4606622e91ab7c589902cabf070bb3e7d8801f' 
  AND token = 'tfXp8HWSMLSwnB1l8XUw8CDuDqH+QwWFly3yJ6rql+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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