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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e67be08b299bb4e00ddededfa595f67fe49b3eed597612aedd8773fd10ef2029' 
  AND token = 'RAk9o3TVd/rSe/wyx3Keopa4oWxfyZDcq0ojGUrXAcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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