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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13a53b4eb0cca6a8334916c7ce48da6101570ce0dba1dd9f0200494a9d21b0b6' 
  AND token = 'BIQuG6h3a962h/WchZqRJBtx8F3S7LR+/tkgAgeyCy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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