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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc5d037c9130cba77eebf383631ad0fbf64211fd2a7f7a4ec7422a714e747e0a' 
  AND token = 'vczuQ674dRfFDpg65Ok11zbFHEc7LruX1yRFXcsDpCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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