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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cda175e47857a8f8ad18d4a07e72693047205573ecb4df8165dfd5ce44319ef2' 
  AND token = 'PhgL3dH8G8fi9Djq/yH2Q7t+5yhZgE+I8inT7biSCLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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