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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eec903d966f9903c7ffce17a0d8b1e483d33c32bd6b6003a0beb772899c59cf4' 
  AND token = 'HqiLNNNtC2woMSRIi00XTmXhOipxC6Zp4E0Fv3b4KaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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