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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ede28374e91fe16781e8f265e259cbc9b9ea813f546eb0c77b1e44ef16dda070' 
  AND token = 'rV0IsZ30CT4iBgBORZ1ppSthw0J61YcMnpvcO6ZpzOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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