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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1229f2e75005509cdb3fe3655a89b02c5e6795ecd9193a43a63e57282fc32be3' 
  AND token = 'I1UAfA1nOPVgeCnuP+R9j5jJAslIgaWlUz84rW2RN9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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