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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '56332dda7eb1abfa5bd04ff477efc125cc4670e6c34cc8aa2afcf06d160cb06d' 
  AND token = 'DsG8ZIWOlVNJQqiGcQbT99bSFZxrnwSZ0A5gLRH2Xew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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