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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19113880f8ba856e380b872dea4ef9198d579efcb7349470c45565140d9d6717' 
  AND token = 'Ofc56tj+i8mOQYzNod9WL+k0yC1G/13KkwBQJt1z9ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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